microordinateur BASIC

Each Monday and Saturday evening, at the end of normal programmes, Radio 3 VHF transmitters broadcast a series of test tones which can be used to help set up and check FM receivers. A number of these test signals are useful when aligning both the IF strip and the stereo decoder published in this issue. The various test signals broadcasted are listed in table I . All signals are sinus-oidal, and are transmitted with pre-emphasis.